Format all tests.

tests/standalone/regress_28854_2_test.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 library regress;
 
 import 'dart:isolate';
 
-abstract class N<T> {
-
-}
+abstract class N<T> {}
 
 class J extends N<String> {
   final String s;
   J(this.s);
 }
 
 class K extends N<int> {
   final int i;
   K(this.i);
 }
 
 void isolate(SendPort port) {
   port.send(new J("8" * 4));
-  for (int i=0; i<80000; i++) {
+  for (int i = 0; i < 80000; i++) {
     port.send(new K(i));
   }
   port.send('done');
 }
 
 main() async {
   var recv = new RawReceivePort();
   recv.handler = (k) {
     if (k is J) print(k.s.length);
     if (k is String) {
       print(k);
       recv.close();
     }
   };
   var iso = await Isolate.spawn(isolate, recv.sendPort);
 }
-